Laserfiche WebLink
<br />o <br />N <br />..r;:. <br />o <br /> <br />point between the two methods. The mid-point was selected in recognition of two factors: there is <br />no apparent information indicating the target should be less than previously adopted, and, there is <br />information indicating the target may need to be increased when analyses associated with the impact <br />that reduced efficiencies and performance of existing projects in accomplishing salinity control are <br />having on program implementation are completed. With the selection of 1.8 million tons per year <br />as the salinity control target, the computation of needed measures is obtained by subtracting from <br />that total the 800,300 tons of salinity per year currently being controlled, leaving 999,700 tons per <br />year to be controlled by new measures. The salinity control requirements are shown in Table 2-4 <br />below. <br /> <br />Table 2-4 <br />Salinity Control Requirements <br /> <br />Total Target (2020) <br />Measures in Place (2001) <br />Plan of Implementation Target (new measures) <br /> <br />1.8 million tons per year <br /> <br />800,000 tons per year <br />1,000,000 tons per year <br /> <br />The Forum anticipates that when the 2005 Review is undertaken, new river model <br />simulations will be made from a refined computer model. This model, it is anticipated, will allow <br />the states and the federal government to simulate a number of future scenarios and receive <br />projections as to long-term salinity control needs. During the next three years, the Forum finds, with <br />the two above analyses having been made, that 1.8 million tons per year oftotal control must be in <br />place by 2020. <br /> <br />The target was calculated without a complete understanding as to whether activities on BLM <br />administered lands produce a net gain or loss to salinity of the Colorado River. The calculation for <br />the controls in place includes a component for the BLM activities. BLM has not yet submitted its <br />status report to Congress on its basinwide salinity control program as required by P.L. 106-459. <br />Qnce the report is submitted and its supporting data are analyzed, the Plan of Implementation's <br />salinity control target may have to be adjusted. <br /> <br />Future salinity concentrations will depend not only upon human activities but upon natural <br />phenomena factors, including, but not limited to, runoff conditions, natural evapotranspiration, and <br />dissolution and mixing within the major storage reservoirs. Even with full implementation of the <br />Colorado River Basin Salinity Control Program's current Plan of Implementation which offsets the <br />human impacts since 1972 and through 2020, the actual concentrations at the three numeric criteria <br />stations (and elsewhere in the Colorado River Basin) will continue to fluctuate in response to <br />hydrologic conditions. <br /> <br />2-9 <br /> <br />-;1 <br />